* {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
}

div {
    box-sizing: border-box;
}

img {
    width: 100%;
    height: 100%;
}

.slider-wrap {
    position: relative;
    width: 100%;
    height: 800px;
}

@media screen and (min-width: 1200px) {
    .slider-wrap {
        height: 800px;
    }
}

@media screen and (min-width:768px) and (max-width:992px) {
    .slider-wrap {
        height: 500px;
    }
}

@media screen and (max-width:768px) {
    .slider-wrap {
        max-height: 390px;
    }
}

.slider {
    height: 100%;
}

.slider .slider-list {
    position: relative;
    height: 100%;
}

.slider .slider-list .item {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.slider .slider-list .item.cur {
    display: block;
}

.yuan {
    position: absolute;
    left: 50%;
    bottom: 40px;
    transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
    -moz-transform: translateX(-50%);
}

.yuan .yuan-item {
    display: block;
    position: relative;
    float: left;
    width: 18px;
    height: 18px;
    margin-right: 1px;
    cursor: pointer;
}

.yuan .yuan-item::after {
    content: "";
    display: block;
    position: absolute;
    top: 4px;
    left: 4px;
    width: 10px;
    height: 10px;
    border: 2px solid rgba(255, 255, 255, .4);
    border-radius: 50%;
    box-sizing: border-box;
}

.yuan .yuan-item.cur::after {
    background: #fff;
}

.yuan .yuan-item::before {
    content: "";
    display: block;
    width: 18px;
    height: 18px;
    background-color: rgba(255, 255, 255, 0);
    border-radius: 50%;
}

.yuan .yuan-item.cur::before {
    background-color: rgba(255, 255, 255, .2);
}

.btn-group {
    width: 100%;
}

.btn-group .btn-left,
.btn-group .btn-right {
    position: absolute;
    width: 50px;
    height: 50px;
    line-height: 50px;
    font-size: 30px;
    text-align: center;
    color: #fff;
    background: rgba(255, 255, 255, .5);
    border-radius: 50%;
    cursor: pointer;
    font-family: "宋体";
}

.btn-group .btn-left {
    left: 15px;
    top: 50%;
    margin-top: -25px;
}

.btn-group .btn-right {
    right: 15px;
    top: 50%;
    margin-top: -25px;
}